Cutter-holder for cutter-heads.



H. G. HARTZELL.

CUTTER HOLDER FOR CUTTER HEADS.

APPLICATION FILED MAR. 27, 1912.

1,039,054. Patented Sept. 17, '1912.

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CUTTER HOLD CR CU HEADS.

AAAAAAAA 102w nun MAR. 27, 1912.

1,039,054, Patnted Sept. 17,1912.

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I kinds and a varying number of cutters to? be employed and interchanged with facility,

HERBERT C. HARTZELL, LOS ANGELES, CALIFORNIA.

CUTTER-HOLDER FOR CUTTER-HEADS.

Specification of Letters Patent.

Patented Sept. 17, 1912.

Application filed March 27, 1912. Serial N 0. 686,548.

To all whom it may concern:

Be it known that I, HERBERT C. HARTZELL,

a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Cutter-Holders for Cutter-Heads, of which the following is a specification.

This invention relates to rotary cutters for Wood working machines, and particu larly to rotary cutters for stickers and mold ers.

One object of the-invention is to provide cutter holders or blocks which may be easily and conveniently secured to and detached from the cutter head, enabling diflerent thus expediting the work of setting the cutter head for doing various kinds of work on a sticker or to perform different kinds of v work on a molding machine.

Afurther object of the invention is to provide a holder which permits of the use of thin hard steel cutting blades, arranged at an obtuse working angle for a scraping cut, thus enabling the cutter to be operated at a faster speed and to perform more work and better work within a given period of time, without liability of slivering hard woods, such as mahogany, birch, etc., that have a curly cross grain, thus overcoming the objections to ordinary cutters working at an oblique angle and operating with a gouging cut.

A still further object of the invention is to provide a holder whereby the blade will be firmly held and may be adjusted as oocasion requires, and which will allow molding and surfacing cutters to be employed at will, and obviates the necessity of removing the cutters except when it is necessary to;

grind or sharpen them.

The invention consists of the features of construction, combination and arrangement of parts, hereinafter fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 is an end view of a cutter head provided with my improved cutter holders. Fig. 2 is an edge View of the same looking toward one of the cutter holders. Fig. 3' is a vertical transverse section on the line 33 of Fig. 2. Fig. 4 is a detail section on the line l4 of Fig. 3. Fig. 5 is an end View of the holder or carrier block. Fig. 6 is an end view of the clamping wedge. Fig. 7 is a detail view of the nut used in conjunction with the adjusting screw.

Referring to the drawings, 1 designates a rotary cutter head provided with a series of supporting faces 2 each having at its rear side in the direction of the rotation of the head a shoulder 3, and each of which communicates with a T-shaped receiving slot 4.

In carrying my invention into practice. I provide a cutter holding or carrier block 5 of substantially truncated triangular form in cross section. The base 6 of this block is adapted to rest against one of the faces 2 of the cutter head and to bear at one of its longitudinal edges against the shoulder 3, said block having projecting from its base one or more T-shaped coupling ribs or memhere 7 to engage the slot 4;.

The body of the block is bifurcated by a longitudinal slot 8 opening through its truncated face and opposite ends and forming opposed walls 9 and 10, the wall 9 having a straight face 11 extending at right angles to the plane of the block and the wall 10 having an inclined face 12 extending at an obtuse angle to the plane of the block. The wall 9 constitutes the front wall and the wall 10 the rear wall of the block in the direction of cutting motion.

The block is adapted to he slipped into and out of position by sliding the T-shaped coupling member or members 7 thereof into and out of engagement with the slot 4: and to be clamped in position on the cutter head and against the coacting supporting face 2 by screws 18 passing through the wall 9 and serving to draw the member or members 7 into clamping engagement with the walls of the slot 4. A cutting blade 14, made of thin hard steel is disposed within the slot 8 with its beveled cutting edge 15 projecting beyond the truncated face of the block and its rear side bearing against the inclined face 12 of the wall 10. The front face of the blade bears against the inclined. face of a wedge-shaped clamping block 16, which bears at its base against the inner wall of the slot 8, and the opposite or inner face of which is straight and disposed in parallel relation to the face 11 of the wall 9. Formed at intervals in said wedge block are threaded transverse openings 17 receiving for their adjustment. gages at its inner end a nut '26 having a lateral lug '21 projecting into the adjacent :greater or less degree. ment of this nut is limited by theshoulder 22.

'nleans ad usted for coarse or fine work or to comcutter head to vary .of cutters as occasion may demand for mold-- screws 18, whose-heads 1:9 are disposed in. the space between and bear against the straight front face of the wedge blockand the opposing face 11 of the wall 9 of the carrier block.

their innenends with recesses forming shoulders 22. "Screwlhreaded openings areform-edin the face of the wall 1 0 and communicate with the passages through said openings extend adjusting screws 24 having niched'heads Q5 exposed Each screw '24 enrecess 27 and bearing against the heel edge of the blade 14, whereby the latter may be adjusted to project its cutting edge 15 to a The outward move- It will be seen from the foregoing description that the cutting blade is clamped "in position between the face 12 and adjustable wedge block 16, and is thereby held firmly from displacement, and that by:v of the screws '24 said blade maybe pensate for wear ofits cuttingedge. It'will also be seen that the blade is held at an f obtuse angle to the block and working face of the cutter head, so that it will operatei with a scraping cut, allowing faster and} better work to be performed on hard woods i of the character mentioned without liability of slivering the same, such as commonly occurs when oblique-angled .cutters of ordinary type operating with a gouging out are; used. Furthermore, it will be understood; that the blade is adjustably held in position; and requires removal only when its cutting} edge is dulled and must be ground or sharpened, so that holders or carrier blocks? provided with different sizes or kinds of' cutters may be carried at-the mill and easily and quickly applied to OTJI'BIIlOVGd from the the number or kinds ing or surfacing, an advantage of material importance in the operation of stickers, where many changes of cutters are required during a working day; The angle at which the blade is held enables blades of thin hard steel to be eifectua lly employed with economy over .the use. of ordinary steel cutting, blades.

20, and

Having thusdescribed the invention, what Iclaim as new is H 1. In a cutter holder for rotary cutters, the combination of a carrier block having a litransverse slot presenting a straight front wall and an inclined rear wall, a cutting bladerdisposed in said slot and resting against said inclined wall at an obtuse work ing angle, an adjustable filler between said blade and the straight wall of the slot. and means for adjusting the blade 'to regulate vthe extent of projection thereof.

In a cutter holder for cutter heads, the

combination of a carrier block of substantially truncated triangular form in cross section, said block having a longitudinal slot extending through its ends and trun cated face and presenting straight and inclined front andrear walls, the rear wall 7 being provided with passages in rear of its inclined face, a cutting blade disposed in said slot and resting against the inclined face of the rear wall at an obtuse working angle,

an adjustable filler block disposed between said blade and the straight wall of the block, adjusting screws projecting into the passages, and members adjustable by said screws to regulate the extent of projection of the blade.

'3. In a cutter holder for rotary cutter I heads, thecombina-tion of a carrier block of substantially truncated triangular form in cross section, said block being provided at its base with one or more T-shaped head- V engaging members, and being formed with a longitudinal slot opening through its ends and truncated face and forming straight front and inclined rear walls, the latternamed wall beingprovided at intervals with passages and recesses intersecting the same, a cutting blade disposedin the slot andbearing against the inclined wall at an obtuse working angle, an adjustable wedge-shaped filler block disposed between said blade and the straight front wall, screws projecting into said passages, and nuts in the passages engaged by the screws and provided with lugs projecting into the recesses and engaging the heel of the blade, whereby said blade may be adjusted to vary its extent of projection.

In testimony whereof I affix nay-signature in presence of two witnesses. V

V HERBERT c. HARTZELL.

"Witnesses: MILDRED I. CHURCH, Susrn P. "HARTZELL.

copies of this patent may .be obtained 01 lfive cents each, by a'dflress'ing'the Iiomm'issioner of iEatents, Washington, D. 0; 

